<template>
  <view class="uv-upload" :style="[$uv.addStyle(customStyle)]">
    <view class="uv-upload__wrap">
      <template v-if="previewImage">
        <view class="uv-upload__wrap__preview" v-for="(item, index) in lists" :key="index">
          <image v-if="item.isImage || (item.type && item.type === 'image')" :src="item.thumb || item.url"
            :mode="imageMode" class="uv-upload__wrap__preview__image" @tap="onPreviewImage(item,index)" :style="[{
							width: $uv.addUnit(width),
							height: $uv.addUnit(height)
						}]" />
          <view v-else class="uv-upload__wrap__preview__other" @tap="onPreviewVideo(item,index)" :style="[{
							width: $uv.addUnit(width),
							height: $uv.addUnit(height)
						}]">
            <uv-icon color="#80CBF9" size="26"
              :name="item.isVideo || (item.type && item.type === 'video') ? 'movie' : 'folder'"></uv-icon>
            <text
              class="uv-upload__wrap__preview__other__text">{{item.isVideo || (item.type && item.type === 'video') ? '视频' : '文件'}}</text>
          </view>
          <view class="uv-upload__status" v-if="item.status === 'uploading' || item.status === 'failed'">
            <view class="uv-upload__status__icon">
              <uv-icon v-if="item.status === 'failed'" name="close-circle" color="#ffffff" size="25" />
              <uv-loading-icon size="22" mode="circle" v-else />
            </view>
            <text v-if="item.message" class="uv-upload__status__message">{{ item.message }}</text>
          </view>
          <view class="uv-upload__deletable" v-if="item.status !== 'uploading' && (deletable || item.deletable)"
            @tap.stop="deleteItem(index)">
            <view class="uv-upload__deletable__icon">
              <uv-icon name="close" color="#ffffff" size="10"></uv-icon>
            </view>
          </view>
          <view class="uv-upload__success" v-if="item.status === 'success'">
            <!-- #ifdef APP-NVUE -->
            <image :src="successIcon" class="uv-upload__success__icon"></image>
            <!-- #endif -->
            <!-- #ifndef APP-NVUE -->
            <view class="uv-upload__success__icon">
              <uv-icon name="checkmark" color="#ffffff" size="12"></uv-icon>
            </view>
            <!-- #endif -->
          </view>
        </view>
      </template>
      <template v-if="isInCount">
        <view @tap="chooseFile">
          <slot>
            <view class="uv-upload__button" :hover-class="!disabled ? 'uv-upload__button--hover' : ''"
              hover-stay-time="150" @tap.stop="chooseFile" :class="[disabled && 'uv-upload__button--disabled']" :style="[{
								width: $uv.addUnit(width),
								height: $uv.addUnit(height)
							}]">
              <uv-icon :name="uploadIcon" size="26" :color="uploadIconColor"></uv-icon>
              <text v-if="uploadText" class="uv-upload__button__text">{{ uploadText }}</text>
            </view>
          </slot>
        </view>
      </template>
    </view>
    <uv-preview-video ref="previewVideo"></uv-preview-video>
  </view>
</template>

<script>
  import {
    func,
    image,
    video,
    array,
    promise
  } from '@/uni_modules/uv-ui-tools/libs/function/test.js';
  import mpMixin from '@/uni_modules/uv-ui-tools/libs/mixin/mpMixin.js'
  import mixin from '@/uni_modules/uv-ui-tools/libs/mixin/mixin.js'
  // 引入插件包
  import { usePermissions, READ_STORAGE } from "@/js_sdk/z-app-permission/z-app-permission.js"
  import {
    chooseFile
  } from './utils';
  import mixin_accept from './mixin.js';
  import props from './props.js';
  /**
   * upload 上传
   * @description 该组件用于上传图片场景
   * @tutorial https://www.uvui.cn/components/upload.html
   * @property {String}			accept				接受的文件类型, 可选值为all media image file video （默认 'image' ）
   * @property {String | Array}	capture				图片或视频拾取模式，当accept为image类型时设置capture可选额外camera可以直接调起摄像头（默认 ['album', 'camera'] ）
   * @property {Boolean}			compressed			当accept为video时生效，是否压缩视频，默认为true（默认 true ）
   * @property {String}			camera				当accept为video时生效，可选值为back或front（默认 'back' ）
   * @property {Number}			maxDuration			当accept为video时生效，拍摄视频最长拍摄时间，单位秒（默认 60 ）
   * @property {String}			uploadIcon			上传区域的图标，只能内置图标（默认 'camera-fill' ）
   * @property {String}			uploadIconColor		上传区域的图标的字体颜色，只能内置图标（默认 #D3D4D6 ）
   * @property {Boolean}			useBeforeRead		是否开启文件读取前事件（默认 false ）
   * @property {Boolean}			previewFullImage	是否开启图片预览功能（默认 true ）
   * @property {Boolean}			previewFullVideo	是否开启视频预览功能（默认 true ）
   * @property {String | Number}	maxCount			最大上传数量（默认 52 ）
   * @property {Boolean}			disabled			是否启用（默认 false ）
   * @property {String}			imageMode			预览上传的图片时的裁剪模式，和image组件mode属性一致（默认 'aspectFill' ）
   * @property {String}			name				标识符，可以在回调函数的第二项参数中获取
   * @property {Array}			sizeType			所选的图片的尺寸, 可选值为original compressed（默认 ['original', 'compressed'] ）
   * @property {Boolean}			multiple			是否开启图片多选，部分安卓机型不支持 （默认 false ）
   * @property {Boolean}			deletable			是否展示删除按钮（默认 true ）
   * @property {String | Number}	maxSize				文件大小限制，单位为byte （默认 Number.MAX_VALUE ）
   * @property {Array}			fileList			显示已上传的文件列表
   * @property {String}			uploadText			上传区域的提示文字
   * @property {String | Number}	width				内部预览图片区域和选择图片按钮的区域宽度（默认 80 ）
   * @property {String | Number}	height				内部预览图片区域和选择图片按钮的区域高度（默认 80 ）
   * @property {Object}			customStyle			组件的样式，对象形式
   * @event {Function} afterRead		读取后的处理函数
   * @event {Function} beforeRead		读取前的处理函数
   * @event {Function} oversize		文件超出大小限制
   * @event {Function} clickPreview	点击预览时触发
   * @event {Function} delete 		删除图片
   * @example <uv-upload :action="action" :fileList="fileList" ></uv-upload>
   */
  export default {
    name: "uv-upload",
    // #ifdef VUE3
    emits: ['error', 'beforeRead', 'oversize', 'afterRead', 'delete', 'clickPreview'],
    // #endif
    mixins: [mpMixin, mixin, mixin_accept, props],
    data() {
      return {
        // #ifdef APP-NVUE
        successIcon: '',
        // #endif
        lists: [],
        isInCount: true,
        is_android: uni.getSystemInfoSync().platform === 'android'
      }
    },
    watch: {
      // 监听文件列表的变化，重新整理内部数据
      fileList: {
        deep: true,
        immediate: true,
        handler() {
          this.formatFileList()
        }
      },
      deletable(newVal) {
        if (!newVal) {
          this.lists.map(item => {
            item.deletable = this.deletable;
          })
        }
      }
    },
    methods: {
      formatFileList() {
        const {
          fileList = [], maxCount
        } = this;
        const lists = fileList.map((item) =>
          Object.assign(Object.assign({}, item), {
            // 如果item.url为本地选择的blob文件的话，无法判断其为video还是image，此处优先通过accept做判断处理
            isImage: this.accept === 'image' || image(item.url || item.thumb),
            isVideo: this.accept === 'video' || video(item.url || item.thumb),
            deletable: typeof(item.deletable) === 'boolean' ? item.deletable : this.deletable,
          })
        );
        this.lists = lists
        this.isInCount = lists.length < maxCount
      },
      uploadFn() {
        this.timer && clearTimeout(this.timer);
        this.timer = setTimeout(() => {
          const {
            maxCount,
            multiple,
            lists,
            disabled
          } = this;
          if (disabled) return;
          // 如果用户传入的是字符串，需要格式化成数组
          let capture;
          try {
            capture = array(this.capture) ? this.capture : this.capture.split(',');
          } catch (e) {
            capture = [];
          }
          chooseFile(
              Object.assign({
                accept: this.accept,
                multiple: this.multiple,
                capture: capture,
                compressed: this.compressed,
                maxDuration: this.maxDuration,
                sizeType: this.sizeType,
                camera: this.camera,
              }, {
                maxCount: maxCount - lists.length,
              })
            )
            .then((res) => {
              this.onBeforeRead(multiple ? res : res[0]);
            })
            .catch((error) => {
              this.$emit('error', error);
            });
        }, 100)
      },
      chooseFile() {
        console.log("选择图片", this.is_android);
        if (this.is_android) {
          usePermissions().requestAppPermission({
            title: "采悠果对相机/摄像头/照片权限申请说明",
            content: "便于您使用该功能上传您的照片/图片及用于更换头像、意见反馈、上传微信支付宝提现二维码等场景中使用。",
            permissionID: READ_STORAGE // 权限ID
          }).then(res => {
            //同意权限申请
            console.log("resresresres", res);
            if (res === 1) {
              this.uploadFn();
            }
          })
        } else {
          this.uploadFn();
        }
      },
      // 文件读取之前
      onBeforeRead(file) {
        const {
          beforeRead,
          useBeforeRead,
        } = this;
        let res = true
        // beforeRead是否为一个方法
        if (func(beforeRead)) {
          // 如果用户定义了此方法，则去执行此方法，并传入读取的文件回调
          res = beforeRead(file, this.getDetail());
        }
        if (useBeforeRead) {
          res = new Promise((resolve, reject) => {
            this.$emit(
              'beforeRead',
              Object.assign(Object.assign({
                file
              }, this.getDetail()), {
                callback: (ok) => {
                  ok ? resolve() : reject();
                },
              })
            );
          });
        }
        if (!res) {
          return;
        }
        if (promise(res)) {
          res.then((data) => this.onAfterRead(data || file));
        } else {
          this.onAfterRead(file);
        }
      },
      getDetail(index) {
        return {
          name: this.name,
          index: index == null ? this.fileList.length : index,
        };
      },
      onAfterRead(file) {
        const {
          maxSize,
          afterRead
        } = this;
        const oversize = Array.isArray(file) ?
          file.some((item) => item.size > maxSize) :
          file.size > maxSize;
        if (oversize) {
          this.$emit('oversize', Object.assign({
            file
          }, this.getDetail()));
          return;
        }
        if (typeof afterRead === 'function') {
          afterRead(file, this.getDetail());
        }
        this.$emit('afterRead', Object.assign({
          file
        }, this.getDetail()));
      },
      deleteItem(index) {
        this.$emit(
          'delete',
          Object.assign(Object.assign({}, this.getDetail(index)), {
            file: this.fileList[index],
          })
        );
      },
      // 预览图片
      onPreviewImage(item, index) {
        const lists = this.$uv.deepClone(this.lists);
        lists.map((i, j) => {
          if (j == index) {
            i.current = true;
          }
        });
        const filters = lists.filter(i => i.isImage);
        const findIndex = filters.findIndex(i => i.current);
        this.onClickPreview(item, index);
        if (!item.isImage || !this.previewFullImage) return
        uni.previewImage({
          // 先filter找出为图片的item，再返回filter结果中的图片url
          urls: this.lists.filter((item) => this.accept === 'image' || image(item.url || item.thumb)).map((item) =>
            item.url || item.thumb),
          current: findIndex,
          fail() {
            this.$uv.toast('预览图片失败')
          },
        });
      },
      onPreviewVideo(item, index) {
        this.onClickPreview(item, index);
        if (!this.previewFullVideo || !item.isVideo) return;
        this.$refs.previewVideo.open(item.url);
      },
      onClickPreview(item, index) {
        this.$emit(
          'clickPreview',
          Object.assign(Object.assign({}, item), this.getDetail(index))
        );
      }
    }
  }
</script>

<style lang="scss" scoped>
  @import '@/uni_modules/uv-ui-tools/libs/css/components.scss';
  @import '@/uni_modules/uv-ui-tools/libs/css/color.scss';
  $uv-upload-preview-border-radius: 2px !default;
  $uv-upload-preview-margin: 0 8px 8px 0 !default;
  $uv-upload-image-width: 80px !default;
  $uv-upload-image-height: $uv-upload-image-width;
  $uv-upload-other-bgColor: rgb(242, 242, 242) !default;
  $uv-upload-other-flex: 1 !default;
  $uv-upload-text-font-size: 11px !default;
  $uv-upload-text-color: $uv-tips-color !default;
  $uv-upload-text-margin-top: 2px !default;
  $uv-upload-deletable-right: 0 !default;
  $uv-upload-deletable-top: 0 !default;
  $uv-upload-deletable-bgColor: rgb(55, 55, 55) !default;
  $uv-upload-deletable-height: 14px !default;
  $uv-upload-deletable-width: $uv-upload-deletable-height;
  $uv-upload-deletable-boder-bottom-left-radius: 100px !default;
  $uv-upload-deletable-zIndex: 3 !default;
  $uv-upload-success-bottom: 0 !default;
  $uv-upload-success-right: 0 !default;
  $uv-upload-success-border-style: solid !default;
  $uv-upload-success-border-top-color: transparent !default;
  $uv-upload-success-border-left-color: transparent !default;
  $uv-upload-success-border-bottom-color: $uv-success !default;
  $uv-upload-success-border-right-color: $uv-upload-success-border-bottom-color;
  $uv-upload-success-border-width: 9px !default;
  $uv-upload-icon-top: 0px !default;
  $uv-upload-icon-right: 0px !default;
  $uv-upload-icon-h5-top: 1px !default;
  $uv-upload-icon-h5-right: 0 !default;
  $uv-upload-icon-width: 16px !default;
  $uv-upload-icon-height: $uv-upload-icon-width;
  $uv-upload-success-icon-bottom: -10px !default;
  $uv-upload-success-icon-right: -10px !default;
  $uv-upload-status-right: 0 !default;
  $uv-upload-status-left: 0 !default;
  $uv-upload-status-bottom: 0 !default;
  $uv-upload-status-top: 0 !default;
  $uv-upload-status-bgColor: rgba(0, 0, 0, 0.5) !default;
  $uv-upload-status-icon-Zindex: 1 !default;
  $uv-upload-message-font-size: 12px !default;
  $uv-upload-message-color: #FFFFFF !default;
  $uv-upload-message-margin-top: 5px !default;
  $uv-upload-button-width: 80px !default;
  $uv-upload-button-height: $uv-upload-button-width;
  $uv-upload-button-bgColor: rgb(244, 245, 247) !default;
  $uv-upload-button-border-radius: 2px !default;
  $uv-upload-botton-margin: 0 8px 8px 0 !default;
  $uv-upload-text-font-size: 11px !default;
  $uv-upload-text-color: $uv-tips-color !default;
  $uv-upload-text-margin-top: 2px !default;
  $uv-upload-hover-bgColor: rgb(230, 231, 233) !default;
  $uv-upload-disabled-opacity: .5 !default;

  .uv-upload {
    @include flex(column);
    flex: 1;

    &__wrap {
      @include flex;
      flex-wrap: wrap;
      flex: 1;

      &__preview {
        border-radius: $uv-upload-preview-border-radius;
        margin: $uv-upload-preview-margin;
        position: relative;
        overflow: hidden;
        @include flex;

        &__image {
          width: $uv-upload-image-width;
          height: $uv-upload-image-height;
        }

        &__other {
          width: $uv-upload-image-width;
          height: $uv-upload-image-height;
          background-color: $uv-upload-other-bgColor;
          flex: $uv-upload-other-flex;
          @include flex(column);
          justify-content: center;
          align-items: center;

          &__text {
            font-size: $uv-upload-text-font-size;
            color: $uv-upload-text-color;
            margin-top: $uv-upload-text-margin-top;
          }
        }
      }
    }

    &__deletable {
      position: absolute;
      top: $uv-upload-deletable-top;
      right: $uv-upload-deletable-right;
      background-color: $uv-upload-deletable-bgColor;
      height: $uv-upload-deletable-height;
      width: $uv-upload-deletable-width;
      @include flex;
      border-bottom-left-radius: $uv-upload-deletable-boder-bottom-left-radius;
      align-items: center;
      justify-content: center;
      z-index: $uv-upload-deletable-zIndex;

      &__icon {
        position: absolute;
        transform: scale(0.7);
        top: $uv-upload-icon-top;
        right: $uv-upload-icon-right;
        /* #ifdef H5 */
        top: $uv-upload-icon-h5-top;
        right: $uv-upload-icon-h5-right;
        /* #endif */
      }
    }

    &__success {
      position: absolute;
      bottom: $uv-upload-success-bottom;
      right: $uv-upload-success-right;
      @include flex;
      // 由于weex(nvue)为阿里巴巴的KPI(部门业绩考核)的laji产物，不支持css绘制三角形
      // 所以在nvue下使用图片，非nvue下使用css实现
      /* #ifndef APP-NVUE */
      border-style: $uv-upload-success-border-style;
      border-top-color: $uv-upload-success-border-top-color;
      border-left-color: $uv-upload-success-border-left-color;
      border-bottom-color: $uv-upload-success-border-bottom-color;
      border-right-color: $uv-upload-success-border-right-color;
      border-width: $uv-upload-success-border-width;
      align-items: center;
      justify-content: center;

      /* #endif */
      &__icon {
        /* #ifndef APP-NVUE */
        position: absolute;
        transform: scale(0.7);
        bottom: $uv-upload-success-icon-bottom;
        right: $uv-upload-success-icon-right;
        /* #endif */
        /* #ifdef APP-NVUE */
        width: $uv-upload-icon-width;
        height: $uv-upload-icon-height;
        /* #endif */
      }
    }

    &__status {
      position: absolute;
      top: $uv-upload-status-top;
      bottom: $uv-upload-status-bottom;
      left: $uv-upload-status-left;
      right: $uv-upload-status-right;
      background-color: $uv-upload-status-bgColor;
      @include flex(column);
      align-items: center;
      justify-content: center;

      &__icon {
        position: relative;
        z-index: $uv-upload-status-icon-Zindex;
      }

      &__message {
        font-size: $uv-upload-message-font-size;
        color: $uv-upload-message-color;
        margin-top: $uv-upload-message-margin-top;
      }
    }

    &__button {
      @include flex(column);
      align-items: center;
      justify-content: center;
      width: $uv-upload-button-width;
      height: $uv-upload-button-height;
      background-color: $uv-upload-button-bgColor;
      border-radius: $uv-upload-button-border-radius;
      margin: $uv-upload-botton-margin;
      /* #ifndef APP-NVUE */
      box-sizing: border-box;

      /* #endif */
      &__text {
        font-size: $uv-upload-text-font-size;
        color: $uv-upload-text-color;
        margin-top: $uv-upload-text-margin-top;
      }

      &--hover {
        background-color: $uv-upload-hover-bgColor;
      }

      &--disabled {
        opacity: $uv-upload-disabled-opacity;
      }
    }
  }
</style>